Proceedings of the 7th International Conference on the Biogeochemistry of Trace Elements (7th ICOBTE), 15-19 June 2003, Uppsala, Sweden. Book of Abstracts. Vol I-II, p 10-11, 2003

Mine:

Waste Type: soil

Contaminant(s): lead, cadmium, zinc

Technology Type: various amendments

Keywords: bioavailability, lead, zinc, cadmium

Abstract: Both lab studies and a field trial were conducted to test the abilities of a range of amendments to reduce the bioavailability of Pb, Zn, and Cd in situ in soil from a mining district. Amendments included P added as triple super phosphate, H3PO4, and rock phosphate; a high Fe municipal biosolids compost, and Ferich, a high Fe byproduct of titanium processing. Changes in bioavailability were measured through an in vivo trial with weanling rats, plant tissue metal concentrations, and a physiologically based extraction test. The results indicate that it is possible to reduce the bioavailability of Pb, Cd, and Zn in field and lab studies; however, response across different environments, endpoints, and elements of concern will vary.